Siderite and Andalusite Physical Properties

Siderite

Andalusite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.83-3.893.05-3.21

1 7.18

1.5 Fracture

Uneven, Conchoidal, UnevenArthur Thomas, Brittle

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {01 1 1}

Good on {110}, poor on {100}

1.7 Mohs Hardness

3.5-4.57.5

2 10

1.8 Chemical Composition

Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Siderite and Andalusite Chemical Formula

While comparing Siderite and Andalusite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Siderite and Andalusite chemical formula.

Chemical formula of Siderite- Fe2+ CO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Siderite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Siderite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Siderite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Siderite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.